Condensation-preventing device



Dec. 1I 1925.

R. C. FREDERICKSON CONDENSATION PREVENTING DEVICE Huurhu- Filed March 6.1925 Smmup Patented Dec. l 1925.

i, uNlrEDfsTAT-Es PATENr OFFICE;

RALPH c, FREDERIGKSON.- or KENSAL, NORTH DAKOTA.

CNDENSATION-PREVENTING DEVICE.

` Application filed mieli 6,1925. serial No. '13,4'7sf,4

To all whom. t may concern:

Be it known that I` RALPH C. Funonnioksou, a citizen ofthe UnitedStates, residing at Kensal, in thel countyof Stutsman and' State ofNorth Dakota, have invented certain new and useful Improvements 1nCondensation-Preventing Devices, of which the following isa full, clear,and exact descripA tion. lo

expensive means for preventing the collection of moisture on windowpanes' and'is intended especially for use in connection wit-h closedautomobiles such as sedans and the like.

It is well understoodthatthe transparency4 of the windows of closedautomobiles, particularly those provided with. heating apparatus, isoften destroyed in cold weather.

by the deposit of a llayer of Vfrost onthe inner surface of the pane.lThis is caused, of

course, by the heated and moisture-laden,

air adjacent the windows becoming chilled and depositing the" condensedmoisture on into frost.

It is an object of thepresent invention tov eliminate theabove-enumerated disadvantages by providing a sheet Aof Celluloid orsimilar transparent material which is applied to the interior orexterior of the window pane so as toprevent the moist air from reachingthe window pane inl the first inistance, and to prevent the cold airfrom reaching-the window pane in the second instance. j

It is also an object of the invention to so attach the sheetofl'celluloid or the 4like i as to provide a partial vacuum between thesame and the'adjacent window pane.

Other objects and-`advantages of the invention will be apparent from thefollowing description when taken iny connection with the accompanyingdrawings, -in which;`

Figure'l is a fragmentary front elevation of an automobile showing mynovel device in position on the exterior of the-windshield. Figure 2 isa vertical section taken on line Qf-2 of Figure 1. y Figure 3 is afragmentary side elevation' ofan automobile showing thecondensationpreventing device attached to the inside of a window pane. jY

Figure 4 is a vertical section taken on line 4-- 4`of Figure 3. l

This invention-relates to a simple and in- Y the pane which Visimmediately converted Figu-re 5 isla fragmentary section Vthrough sideWindows 2 and windtaining' a comfortable temperature on the interior ofthe car during the Winter months,

fand as herein before stated, moisture is caused to be deposited on theinner surface .of the window panes, and windshield and' in very coldweather this moisture is-con-' verted into frost which renders thewindow panes as well as the windshield merely Vtranslucent and cuts olfthe view ofthe operator of the automobile as -well as 'of Atheoccupants.

By'means of the present invention which may be attached either to theouter'surface the inner surface thereof, this objectionable ldeposit offrost on the window panesis prevented. Obviously, if the moistatmosphere of the interior of the automobile is pre- -ofthe'window panesor windshield or to vented from reachingthe windowpane and cannot becomechilled no moisture will b e deposited on the window pane. Furtheri.more, if the cold air on the eXterio'rof the automobile is preventedfrom reachingthe outer surface 'of the window pane ,the latter will notbecome chilled and will 4therefore not cause moisture contained in theheated atmosphere in the interior of the automoible to be deposited onj`the inner surface'A of the window pane.

The present'invention therefore compri-ses a sheet of transparentmaterial such' as cele.

luloid or the like which isin'dicated-by the numeral 4 and vwhich may beapplied tothe outer surface of the window panes-as indicated in Figuresl and @for upon the in-' vner surface thereof as mdijcated 1n Flgures 3and 4. By applying'the sheet oftransl parent material 4v to theoutersurface of the window pane, cold air prevented' from chilling the windowpane and thereforepr'e vents moisture from being deposited on that partof `the window pane covered by. the sheet of Celluloid.l Likewise, ifthe sheet edges embedded in astrip of rubber 5 al? though manyotherflexible 'and compressible materials might be substituted therefor.`

The rubber strip 5 is so applied to the edges of the sheet 4 as toprovide an annular pro- "ection which extends a substantial distanceeyond the plane of the sheet and this projecting portionor rim isprovided with a concavity or depression 6, as clearly shown .in Figures2, ,4 and 5, and which converts the rubber strip into what may be termedl 4a vacuum cup. In ap lying the device to the window pane it is o viousthat it is only necessary to press the vacuum cup 5 tightly .against thewindow pane so as to flatten out the concavity 6, thereby ejecting theair from the space inclosed by the wall of this concavity and theportion ofthe window )ane covered thereby. When the pressure is removedfrom thestrip 5 the device will adhere to the window ane in a mannerwell understood. It may e here pointed out, however, that a partialVacuum and dead air space is also provided between the transparent sheet4 and the window pane by this method of applying thecondensationpreventing device, for the reason that when the vacuum-cup 5ispl collapsed the sheet 4 approaches very close to the window pane 3and whenl pressure is released. this sheet is caused to move away aslight distance from the window pane due to the compressible materialforming the vacuum, cup returning to a shape approximating its originalcondition. And, since both vacuums and dead air spacesfarepoorconductors of heat it will be apparent that when the device is appliedto the exterior of the window pane as shown. in Figures 1 and 2, thecold air will be `prevented from reaching that portion of the windowIanel covered by the sheet 4, and when the evice is applied to "theinterior of the window pane as shown in Figures 3 and 4 the heated airis prevented from'coming in contact with that portion of the window panecovered by the sheet of transparent material. lFurthermore, thecelluloid sheet 4 will be protected against being chilled by the partialvacuum which has been set up in the space between the window pane andthe sheet.

In the form of the invention shown in Figure 6 the edges of theCelluloid sheet are embedded in a vfelt strip 7 and this strip may beapplied to the windshield o rthe like byl means of some adhesivematerial such as glue; while in Figure 7` is shown-a vacuum cupcomprising'a rubber strip 8 similar to that disclosed in Figures 1 to 5inclusive and which is directly un'itedvto a felt strip 9 in which theedges of the celluloid sheet 4 are embedded. In this latter form of theinvention, of course, the device is attached tothe windshield in amanner identical with that previously described and shown in Figues 1 to5 of the drawings.

' From the foregoing description taken in connection with theaccompanying drawings it will be apparent that I have devised a verysimple and inexpensive construction of condensation preventin devicewhich may be4 applied to a winds ield or the like without the use oftools or skilled labor, and which will successfully prevent thecollection of frost -upon the window 'panes to ywhich it is attached.

In accordance with the patent statutes I have described what I nowbelieve to be the best embodiment of the invention,` but I do not Wishto be understood thereby as limiting myself or the scope of theinvention, -as many changes and modifications maybe made withoutdeparting from the spirit of the invention; all such I aim to include inthe scope of the appended claim.

What I claim as new and desire to secure by Letters Patent is:

In a device of the class described an annular vacuum cup composed of acontinuous strip of rubber and a continuous strip of fabric directlyunited, a transparent sheet of celluloid positioned within said annularvacuum cu l and having its edges attached to said abric stri RALPH- C.FRED RICKSON.

